ARTHUR AND JOHNSTON: UREDINALES OF CUBA 119 
barium of the New York Botanical Garden, one from Barahona, 
St. Domingo, May, 1910, II, Pater Fuertes 192, and the other from 
San Michel, Hayti, Aug. 5, 1905, ii, Nash & Taylor 1303. А part 
of a collection made by Charles Wright in Cuba, bearing no data 
except the number 480, has been sent by Dr. W. G. Farlow from 
the Curtis collection, which proves to be the uredinial stage of this 
species. All collections of the species so far seen have been found 
to be on Cassia emarginata. 
24. Uromycladium (?) cubense sp. nov. 
N MIMOSACEAE: 
Mimosa pigra L. (M. asperata L.), Soledad Cienfuegos 
(Prov. Santa Clara), Nov. 6, 1915, Johnston ror. 
Telia amphigenous, emaculate, scattered, oval or oblong, 
0.2-0.4 Бу 0.5-І mm., subcuticular, soon naked, pulverulent, 
chestnut-brown, ruptured cuticle conspicuous, teliospores triangu- 
lar-obovate, or short-pyriform, length and breadth the same, 
15—18 и, remaining attached to pedicel in groups of 1-4 (usually 2); 
wall at sides colorless, smooth, and thin, 1 u, above chestnut- 
brown, finely and closely verrucose, 1.5-2 и thick; pedicel in upper 
part firm, remaining attached to spores, chestnut-brown, 7-9 u 
broad, 7-10 и long, the wall about 1.5 и thick, part below colorless, 
thin-walled, collapsing and readily falling away. 
This unique rust does not drop readily into any genus. It is 
placed tentatively їп Uromycladium, although the spores are not 
clearly arranged in series on the pedicel, and no cyst is present. 
There are other variations, as for instance, the lack of an evident 
germ pore, as well as the absence of uredinia and pycnia. More- 
over, Uromycladium has heretofore been accounted a peculiarly 
Australian genus. 
25. CALLIOSPORA FaARLOWII Arth. Bot. Gaz. 39: 391. 1905. 
ON FABACEAE: 
Parosela domingensis (DC.) Heller (Dalea domingensis 
DC.), Vento (Prov. Habana), Aug. 26, 1905, Baker 3312. 
This short-cycle rust, having pycnia and telia, is known only 
on the one species of host, and only from Cuba and Mexico. 
26. TRANZSCHELIA PUNCTATA (Pers. Arth. Résult. Sci. Congr. 
Bot. Vienne 340. 1906. 
Aecidium punctatum Pers. Ann. Bot. Usteri 20: 135. 1796. 
Puccinia Pruni-spinosae Pers. Syn. Fung. 226. 1801. 
